Truck provided with special ball-bearings.



G. GENTLE.

TRUOK PROVIDED WITH SPECIAL BALL BEARINGS.

APPLICATION FILED sum. 9, 1908.

912,463, Patented Feb. 16, 1909.

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MZmm Izmwrfm 0. GENTLE. TRUCK PROVIDED WITH SPECIAL BALL BEARINGS.APPLICATION FILED SEPT. 9,1908.

912,463. Patented Feb. 16, 1909.

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@MW I CHARLES GENTLE, OF HAMILTON, ONTARIO, CANADA.

TRUCK PROVIDED WITH SPECIAL BALL-BEARINGS.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed September 9, 1908. Serial No. 52,298.

To all whom it may concern:

Be it known that 1, CHARLES GENTLE, a subject of the King of GreatBritain, and resident of Hamilton, in the county of Wentworth andProvince of Ontario, Canada, have invented new and useful Improvementsin Trucks Provided with Special Ball- Bearings, of which the followingis a specification.

My invention relates to trucks provided with special ball bearin s, andconsists of a framework having suita le rear handles and a forwardtransverse stationary axle provided with side wheels adapted to rotateon ball bearings on said axle and on the ground.

The objects of my invention are, first,. to provide a wheel having twosets of ball earings, comparatively wide apart, adapted to rotate on astationary axle of a truck, thereby steadying the rim of the wheel andpreventing any side movement to the same, second, to provide means forinserting the ball in position between the hub of the wheel and thestationary axle, third, to provide means for keeping the bearings intactfrom any foreign substance. I attain these objects by the mechanismillustrated in the accompanying drawing in which Figure 1 is anelevation of a hand truck. Fig. 2 is a plan of the same showing the sidewheels on the forward ends of the frame, and the opposite ends of theframe brought considerably closer together and curving toward each otherto receive a transverse handle, then diverging apart to form curved endhandles. Fig. 3 is a sectional end elevation of the wheel end of thetruck through the broken line A, A, of Fig. 2 of the drawing. Fig. 4 isan enlarged face elevation of one of the wheels of the truck, on itsaxle. Fig. 5 is an enlarged sectional elevation of the same. Fig. 6 isan enlarged detail side elevation of one end of the frame showing howthe axle is secured to the frame and to the transverse axle rail, showin broken lines. Fig. 7 is an enlarged detail section of the transverseaxle rail showing means .to prevent the axle from moving endwise.

Similar characters refer to similar parts throughout the several views.

In the drawing B is the frame of the truck, and comprises sides B, whichare held a suitable distance apart by the forward transverse rail C, thecentrally located andsimilar transverse rail D, and a transverse handleE.

The sides B are curved to the handle E, and at this part are onlysufliciently apart to easily admit the hand on the handle E. The sidesA, then diverge from the handle E, and form two curved side handles 2.

F is the stationary axle having annular grooves 3, a distance apart, andis rigidly secured to the underside of the wheel end of the frame, bymeans of axle brackets i,which are secured to the frame.

H are the side ground wheels, the rims of which are shown broken, inFigs. 4 and 5 of the drawing, and may be of suitable diameter andbreadth to suit various sizes and shapes of trucks.

The side wheels have suitable hubs 5, which extend beyond the rims ofthe wheels. I will here describe one side wheel H, as both areidentical. The bore of the hub 5, is larger in diameter than is the axleF, and in the hub are grooves 6, opposite to the grooves 3, of the axle,and conform therewith. J, are ball bearings fitting in said grooves andadapted to revolve and rotate therein. It will be noticed that the axleand hub are devoid of any cones and sleeves of any kind, and that thehub and axle are each solid and do not contact with each other in anypart, the balls being the only medium of contact. K, are parallelvertical openings in the hubs 5, and opposite to the grooves 6 in saidhub. The openings K are larger in diameter than the balls J, and are forthe purpose of admitting the balls to position, and large enough toadmit larger balls in case the grooves in the axle and in the hub becomepossibly larger through wear of the grooves by the rotary motion of theballs. The openings K also serve as oil holes for oiling the ballbearings. The openings K are provided with removable screwed plugs M,the inner ends of which are concaved to conform to the round balls, andin consequence of the plugs M being of larger diameter than the ballsthe ends of the plugs do not form a feather edge, to

contact with and impede the balls, but have a surface. The axle on oneside of the wheel terminates flush with the hub, and an end cap N isprovided which contacts with the end of the axle and the hub and extendsaround the hub in close position and secured thereto by means of a plugM. The cap N, is for the purpose of preventing dust and other foreignmatter from entering the ball bearings. The parts of the hub containingthe plugs are heavier than the other arts of the hub, to afiord aprominent solid thickness of metal for the stability of said plugs.

In Fig. 7 of the drawing a pin P is shown secured in the axle F andextending into the axle rail 0 to retain the axle in definite position.

The most important feature of this invention is the fact that the ballbearings must.

extend beyond the rim of the Wheel, and e ually divided beyondsaid rim,in order to aford perfect steadiness to the rim, and to allow the holesK to be drilledand screwed parallel with each other andin consequencethe said holes can be drilled and screwed Without the drilling tools andother mechanism employed for the purpose, contacting to prevent side orlateral movement of the axle, a rotary Wheel on the axle, grooves in thebore of the hub of the Wheel spaced apart and beyond the rim of the heelto steady said rim, annular grooves in the axle to conform to thegrooves in the wheel, parallel o enings through said hub and opposite tot e grooves, removable plugs'in the openings to admit. and to retainsaid balls in the grooves. 1

2. In a truck, a frame, the sides of one end of the frame curving towardeachother and brought in contiguity with each other to form handles,atransverse handle between said nearest parts of the handles andsufiicient only to allow one hand between said side handles, astationary transverse axle on the opposite end of the frame and Wheelsadapted to rotate on the axle, substantially as described.

CHARLES GENTLE.

